Speculation on Lewis’s heart.
So here’s a question: can Lewis turn fully intangible?
Now this may seem like a silly question, because, well, he’s a ghost. Ghosts are kinda known for intangibility. However, it’s quite possible that at least one part of him is not, and you can probably figure out which I mean.
That’s right: the locket. It seems like the general consensus in the fandom is that the locket is a physical object which Lewis owned prior to his death, and usually what I’ve seen is that it’s his anchor in the world of the living. Could he turn that intangible too? Or if he ever had to walk through a wall, would he have to leave the locket behind in Vivi’s/Arthur’s care or something?
Which brings me to another question: how far away can Lewis get from his locket? Does he get weaker as his distance from it increases? To what degree does damage to the locket affect Lewis? So many questions and only five minutes of canon….